Linux项目一
引言：
这是我去年做的东西，一直没有时间整理，今天又要做一个基于这个项目的客户端与服务器版本。
以前我写的库文件中的函数耦合度很大，在一个函数中调用另一个函数，导致一无法拆开使用！
因此，我对以前写的库进行接口的更改，以更好的适应更多的项目。
当然我也把以前写的小程序贴出来，以供大家参考！
需求：
1.搜索bmp图片转换成黑白图片复制到另一个文件中
2.系统为Linux
自定义功能函数：
1.打印目录：
1 #include<unistd.h> 2 #include<stdio.h> 3 #include<dirent.h> 4 #include<string.h> 5 #include<sys/stat.h> 6 #include<stdlib.h> 7 void printdir(char *dir,int depth)/*打印目录*/ 8 { 9 DIR *dp; 10 struct dirent *entry; 11 struct stat statbuf; 12 13 if((dp=opendir(dir))==NULL) 14 { 15 fprintf(stderr,"cannot open directory:%s ",dir); 16 return; 17 } 18 chdir(dir); 19 while((entry=readdir(dp))!=NULL) 20 { 21 lstat(entry->d_name,&statbuf);/**获取文件信息，保存在statbuf**/ 22 if(S_ISDIR(statbuf.st_mode))/***判断是否为目录***/ 23 { 24 if(strcmp(".",entry->d_name)==0||strcmp("..",entry->d_name)==0) 25 continue; 26 printf("%*s%s/ ",depth," ",entry->d_name); 27 printdir(entry->d_name,depth+4); 28 } 29 else 30 printf("%*s%s/ ",depth," ",entry->d_name);/***为文件***/ 31 } 32 chdir(".."); 33 closedir(dp); 34 }
2.删除文件：
1 #include<unistd.h> 2 void del_file(const char *filename) 3 { 4 unlink(filename); 5 return 1; 6 }
3.复制文件：
#include<unistd.h> void lkbmp(const char *source,const char *target) { if(link(source,target)==0) printf(" link is successful "); else printf(" link is error "); }
4.对彩色图片转换成黑白图片
#include<stdio.h> #include<string.h> int bmp(char filename[]) { FILE *fo,*fin; RGN rgb,black={0,0,0,0},white={255,255,255,0}; char name[256]=" "; unsigned char temp[14]=" "; unsigned int offset=0; /***在文件名中添加copy_来区别原文件***/ int len=strlen(filename); strncpy(name,filename,len-4); strcat(name,"_copy.bmp"); if((fo=fopen(filename,"rb+"))==NULL) printf("can not open %s",filename); if((fin=fopen(name,"wb+"))==NULL) printf("can not open %s",name); fseek(fo,10,0); fread(&offset,4,1,fo); printf("%X ",offset); fseek(fo,0,0); unsigned int i=1; while(i<=offset) { fread(temp,1,1,fo); fwrite(temp,1,1,fin); i+=1; } while(!feof(fo)) { fread(&rgb,4,1,fo); if((rgb.Blue+rgb.Green+rgb.Red)/3<125) fwrite(&black,4,1,fin); else fwrite(&white,4,1,fin); } fclose(fo); fclose(fin); return 0; }
完整自定义库文件：
1 #include<unistd.h> 2 #include<stdio.h> 3 #include<dirent.h> 4 #include<string.h> 5 #include<stdlib.h> 6 #include<sys/stat.h> 7 #include<sys/types.h> 8 #include<sys/wait.h> 9 #include<stdlib.h> 10 #include<time.h> 11 #include <sys/msg.h> 12 FILE *fp,*fbmp,*flog; 13 struct dirent *entry; 14 struct stat statbuf; 15 unsigned short BMP=0x4D42, 16 JPG=0xD8FF, 17 PNG[4]={0x5089,0x474E,0x0A0D,0x0A1A}, 18 GIF[3]={0x4947,0x3846,0x6139}; 19 static char path1[256],path2[256],watchdog[256],name[256]; 20 struct tm *tm_ptr; 21 time_t the_time; 22 23 //判断图片头文件的结构体 24 typedef struct tagRGBQUAD 25 { 26 unsigned char Blue;// À¶É«µÄÁÁ¶È£šÖµ·¶Î§Îª0-255) 27 unsigned char Green; // ÂÌÉ«µÄÁÁ¶È£šÖµ·¶Î§Îª0-255) 28 unsigned char Red; // ºìÉ«µÄÁÁ¶È£šÖµ·¶Î§Îª0-255) 29 unsigned char Reserved;// ±£Áô£¬±ØÐëΪ0 30 } RGN; 31 32 void init()/*用于初始化程序*/ 33 { 34 printf("file opened now "); 35 fp=fopen("wrg.text","w+"); 36 flog=fopen("wrlog.text","w+"); 37 fbmp=fopen("bmpname.text","w+"); 38 } 39 void Exit() 40 { 41 printf("everything is gone "); 42 fclose(fp); 43 fclose(fbmp); 44 fclose(flog); 45 } 46 int istupian(char entry[]) 47 /*返加值为 48 1 bmp; 49 2 jpg; 50 3 png; 51 4 gif; 52 */ 53 { 54 FILE *fis; 55 short int i=0; 56 unsigned short pis[5]; 57 int flag=0;//每次调用都进行初始化 58 if((fis=fopen(entry,"r"))==NULL) 59 printf("can not read %s ",entry); 60 fread(pis,8,1,fis); 61 62 if(pis[0]==BMP) 63 { 64 flag=1; 65 printf("it is a bmp "); 66 } 67 else if(pis[0]==JPG) 68 { 69 flag=2; 70 printf("it is a jpg "); 71 } 72 else if(PNG[0]==pis[0]&&PNG[1]==pis[1]&&PNG[2]==pis[2]&&PNG[3]==pis[3]) 73 { 74 flag=3; 75 printf("it is a png "); 76 } 77 else if(GIF[0]==pis[0]&&GIF[1]==pis[1]&&GIF[2]==pis[2]) 78 { 79 flag=4; 80 printf("it is a gif "); 81 } 82 return flag; 83 84 85 } 86 void wrtlog()/*将文件的路径写入路径中*/ 87 { 88 printf("write to wrtlg "); 89 fprintf(fp,"%s/%s ",getcwd(NULL,1024),entry->d_name); 90 fprintf(fbmp,"%s ",entry->d_name); 91 } 92 void wrlog(char name[])// 将日记写入文件中 93 { 94 static int i=0; 95 (void)time(&the_time); 96 //tm_ptr=gmtime(&the_time); 97 if(i==0) fprintf(flog,"文件名 /状态 ／时间 ／ "); 98 ++i; 99 fprintf(flog,"%s 删除 ",name); 100 101 fprintf(flog,"%s ",ctime(&the_time)); 102 //fprintf(flog,"%02d:%02d:%02d:%02d:%02d:%02d ",tm_ptr->tm_year,tm_ptr->tm_mon+1,tm_ptr->tm_mday,tm_ptr->tm_hour,tm_ptr->tm_min,tm_ptr->tm_sec); 103 } 104 void printdir(char dir[])/*打印目录*/ 105 { 106 DIR *dp; 107 printf("printdir ******doing now "); 108 if((dp=opendir(dir))==NULL) 109 { 110 fprintf(stderr,"cannot open directory:%s ",dir); 111 return; 112 } 113 chdir(dir); 114 while((entry=readdir(dp))!=NULL) 115 { 116 lstat(entry->d_name,&statbuf); 117 if(S_ISDIR(statbuf.st_mode)) 118 { 119 if(strcmp(".",entry->d_name)==0||strcmp("..",entry->d_name)==0) 120 continue; 121 printdir(entry->d_name); 122 } 123 else 124 wrtlog(); 125 } 126 chdir(".."); 127 closedir(dp); 128 } 129 int bmp(char filename[]) 130 { 131 FILE *fo,*fin; 132 RGN rgb,black={0,0,0,0},white={255,255,255,0}; 133 char name[256]=" "; 134 unsigned char temp[14]=" "; 135 unsigned int offset=0; 136 /***在文件名中添加copy_来区别原文件***/ 137 int len=strlen(filename); 138 strncpy(name,filename,len-4); 139 strcat(name,"_copy.bmp"); 140 141 if((fo=fopen(filename,"rb+"))==NULL) 142 printf("can not open %s",filename); 143 if((fin=fopen(name,"wb+"))==NULL) 144 printf("can not open %s",name); 145 fseek(fo,10,0); 146 fread(&offset,4,1,fo); 147 printf("%X ",offset); 148 fseek(fo,0,0); 149 unsigned int i=1; 150 while(i<=offset) 151 { 152 fread(temp,1,1,fo); 153 fwrite(temp,1,1,fin); 154 i+=1; 155 } 156 while(!feof(fo)) 157 { 158 fread(&rgb,4,1,fo); 159 if((rgb.Blue+rgb.Green+rgb.Red)/3<125) 160 fwrite(&black,4,1,fin); 161 else 162 fwrite(&white,4,1,fin); 163 } 164 165 fclose(fo); 166 fclose(fin); 167 return 0; 168 } 169 //硬连接 170 /*返加值为 171 1 bmp; 172 2 jpg; 173 3 png; 174 4 gif; 175 */ 176 void lkbmp() 177 { 178 fseek(fp,0,0); 179 fseek(fbmp,0,0); 180 while(fscanf(fp,"%s",path1)!=EOF&&fscanf(fbmp,"%s",name)!=EOF) 181 { 182 /***path2 的路径已经初始化，将文件名接到path2中，链接好后，将watchsog重新载入watchdog中***/ 183 strcat(path2,name); 184 printf("%s",path2); 185 if(link(path1,path2)==0) 186 { 187 printf(" link is successful "); 188 } 189 else 190 printf(" link is error "); 191 //恢复母路径 192 if(istupian(path2)==1) 193 bmp(path2); 194 strcpy(path2,watchdog); 195 } 196 197 } 198 //删除非图片文件 199 int del_dir() 200 { 201 fseek(fp,0,0); 202 fseek(fbmp,0,0); 203 while(fscanf(fbmp,"%s",name)!=EOF) 204 { 205 //path2 的路径已经初始化，将文件名接到path2中，链接好后，将watchsog重新载入watchdog中 206 strcat(path2,name); 207 if(!istupian(path2)&&unlink(path2)==0) 208 {unlink(path2); 209 printf("unlink %s is successful ",path2); 210 wrlog(path2); 211 } 212 else 213 printf("unlink %s is error ",path2); 214 //恢复母路径 215 strcpy(path2,watchdog); 216 } 217 return 1; 218 219 }
对应的执行文件：
1 #include"myhead.h" 2 #pragma pack(2) 3 int main(int argc,char *argv[]) 4 { 5 char topdir[128] = "."; 6 if(argc>=2) 7 strcpy(topdir,argv[1]); 8 printf("已经得到目录："%s" ",topdir); 9 printf("初始化中"); 10 init(); 11 printf("初始化完毕 "); 12 printf("start printdir "); 13 printf("进入原始路径,得到母路径。"); 14 chdir(topdir); 15 chdir(".."); 16 strcpy(path2,getcwd(NULL,1024)); 17 //创建D目录,可以以作为子进程 18 strcat(path2,"/D/"); 19 mkdir(path2,0770); 20 printf("母路径:%s ",path2); 21 strcpy(watchdog,path2); 22 pid_t fork_res; 23 fork_res=fork(); 24 if(fork_res==0) 25 { 26 printf("Child now "); 27 while(del_dir()!=1); 28 printf("del_dir done. "); 29 return 1; 30 } 31 else if(fork_res>0) 32 { 33 printdir(topdir); 34 printf("printdir done. "); 35 lkbmp(); 36 printf("lkbmp done "); 37 del_dir(); 38 return 0 ; 39 } 40 else 41 { perror("fork failed"); 42 exit(1); 43 } 44 45 46 47 printf("程序运行结束"); 48 exit(0); 49 }